Door check



Feb. 5, 1952 e H. v. MILLER 2,584,903

DOOR CHECK Filed Dec. 20. 1949 /NvE/vron Hara/d Vern Mil/er AttorneysPatented Feb. 5, 1952 n DOOR CHECK Harold Vern.` Miller, Arlington, Va.

Application December-'20, 1949, Serial No. 134,028

able to. hotel roomsl apartments. and public dwelling and livingquarters wherethere isaneed for cross ventilationand security. Whiledoor checks of various types have previouslybeen proposed for thepurpose of keeping doors ajar, these devices do not provide satisfactorymeans for preventing entrance while the door is in an open position forVentilating the room. y

It, accordingly. is a primary object. of this invention to provide asuitable inexpensive ldoor checkvto secure. al door in partiallyopenposition.

A further object of the present invention resides in the provision of anovel door stop for use in combination with a conventional securingchain to provide. ventilation and. at the vsame time secure the dooragainst unauthorized entry.

Still another object of the present invention resides in providing anexpansible door stop cooperating with a night chain tomaintain the dooropen to the extent permitted by the night chain. I 'Another object ofthe present invention resides in provision oi a door stop which maybereadily disposed either inoperative or inoperative` position.

Still another object of the present invention resides in mounting anexpansible door stop on the door frame in predetermined relation to theconventional Anightphain so as to cooperate in one position with thenight chain to lock the door in open psition and in its other positionto be disposed out of the entrance way to provide free passage throughand past the door.

Other objects will become apparent as the description proceeds inconnection with the appended claims and accompanying drawings wherein:

Figure l is a front elevation of a preferred embodiment of the presentinvention.

Figure 2 is a top plan view of Figure 1.

Figure 3 is a transverse sectional view, and

Figure 4 is a perspective view of a, modified form of the presentinvention.

Referring to the drawings wherein like reference numerals indicate thesame parts throughout, the door check of the present invention is 2Claims. (Cl. 292-2621' generally indicated by the reference numeral I0and comprises a door securing element such asv the conventional nightchain, generally indicated at II and a cooperating expansible door stopdesignated by numeral I2. A plate I4 preferably secured to the door jambI 6 by means of screws I8 supports the securing element II and stop I2.To this end, plate I4 carries a staple-20 and is provided with a ballsocket portion 22 the purpose of which will be described later.

The door 23 preferably is provided-'with a latch plate 24 fastened tothe door by means of Ascrews 28. Plate 24 has an elongated undercut slot30 formed therein to receive a slidable T shaped securing plate 32 towhich one end of a chain 36 is attached by means of a staple 31 or othersuit-A able means in conventional manner. `Thejopposite end of chain 36is suitably connected to staple 20 in well known manner.' r

The door is secured against full opening movement by inserting the Tportion of plate 32 into the enlarged opening 29 in slot 30 and slidingthe plate along slot. 30 in well known manner. The night chain, asis'well known, allows the door to be opened a predetermined distance forthe purpose of viewing whoever might wish entrance. It will beappreciated that maintenance ofthe door in this partly open positionwill afford desirable ventilation. This invention contemplatesaccomplishment of this end by provision.- of the expansible door stop Iloperating incooperationwith the night chain.

The door stop I2 may assumez anysuitable form but preferably comprisesan axially compressible rod-like member. Such member may take the formof a hollow casing having an annular end flange 40 which increases therigidity of the casing at one end and also provides an abutment thepurpose of which will presently appear. The casing 38 at its oppositeend has a reduced portion 42 into which a rod 44 carrying a bumpermember 46 is rigidly iixed.

Within the casing 38 is a compression spring 48 which is coniinedbetween an offset portion 50, formed in casing 38. and an enlarged endmember 52 fixed to :a rod 54 the other end of which is loosely held insocket 22 of plate I4. The enlarged end 52 of rod 54 is mounted forsliding movement in casing 38 and conned against removal from the end ofcasing 38 by a cap 56 press fitted into the end of casing 38. The cap 56has an annular outwardly directed ange 58 and an inwardly directed ange60 connected by an intermediate portion 6I substantially parallel to theaxis of rod 54. The depending 3 :lange 60 of cap member 56 acts as anabutment to limit the stroke of the rod 54. The other end (3) of rod 54is movably secured to plate I4 in any suitable manner but preferablycomprises a ball connection 62 cooperating with ball socket 22 toprovide a limited universal mounting of the door stop on plate I4. Theball socket 22 prefer-- ably has an elongated slot 64 disposedvertically with respect to the door frame and adapted to freely receivethe rod 54 to permit'the door stop to assume a-posit'ion parallel tothe-door 'jamb I6 when in an inoperative position. As a. con, 1

4 of predetermined length connected at one end to said mounting plateand having a securing plate secured to its other end adapted tocooperate with said latch plate to removably secure said other end ofsaid chain to said other member and thereby adapt said chain to limitthe opening movement of said door member to an extent wherebydisassociation of said latch plate and said securing plate isrenderedimpossible withinthelimited opening movement permitted; andresilient axially expansible door stop having an axial dimension whenfully expanded in 'excess of the limited opening permitted by saidlchain, one end swingably mounted on one of said members and its otherend adapted to abut the other-of said members and force the door -opento the limitedextent permitted by said use in conjunction with nightchains already installed to provide a door check having thel adl.

vantages of the present invention. In this form, a plate 66 having aball socket portion 22 and adapted to be separately mounted on a doorframe in juxtaposition to the night chain mounting plate is provided.Since the only difference between this form of the invention and that,

in all respects as illustrative and not restrictive,

the scope of the invention being indicated by the appended claims ratherthan by the foregoingV description, and all changes which come withinthe meaning and range of equivalency of the claims are thereforeintended to be embraced therein.

What is claimed and desired vto be secured by United States LettersPatent is:

1. A, door check cooperating with a door member and a frame member Ytosecure said doork member` in partly open position comprising a mountingplate adapted to be secured to one of said members; a latch plateadapted to besecured to the other of said members; a night chain chainwhereby said chain and door stop coopcrate-to vyieldingly secure saiddoor member open to the limit of the opening movement permitted by saidchain.

2. A door stop adapted for cooperation with a night chain'to provide adoor checkforsecuring a door in partly open position comprising arod-like member having one end adapted to be swingably mounted on amounting plate;v a tube-like member telescopically receiving the otherend of said rod-like member and having an abutment element at the endremote from said rod-like member; a compression spring disposed withinsaid tube-like member and operable to yielding urge saidV rod-likemember and said tube-like member in opposite drections; and a cap pressfitted inthe other end of said tube-like' member to provide a stop forpreventing disassociation of said members and having an axial openingtherethrough for freely receiving the intermediate portion of saidrod-like member.

Y H. VERN MILLER.

REFERENCES CITED The following references are of recordin the file ofthis patent: I

UNITED STATES PATENTS

